Propeller



Feb. 9, 1932. B. B. M cRosKY PROPE LLER Filed May 27, 1950 W a z O. w G a 5 4 y /W PM a w m Ill 5 4 /0 l I 6 Z Patented Feb. 9, 1932 UNITED STATES PATENT OFFICE BYNUM B. MCCROSKY, OF OAKLAND, CALIFORNIA PROIELLER Application filed May 27, 1930. Serial No. 456,118.

The invention is for a propeller and has bolted at 7 to a flange integral with the hubs special reference to the retracted vane type and 6. The vanes consists of sheet metal of air propeller to be used for the propulsion members formed to U shape and having front of air craft and for similar purposes. 8 and sides 9 and 10 the sides 9 and 10 being 6 The object of the invention is to provide a plvotally mounted 'etween the discs 3 and e propeller which may be adjusted while in op- 1 as at 11. Adjacent the front 8 of the vanes, eration to react in any desired direction connecting rods 12 are pivotally connected as transversely of the axis, whereby the propelat 13, the opposite end being pivotally conlcr may be quickly changed to provide tracnectcd at let to a ring 15 mounted on the outer 10 tion, repellency, lifting or depression or comrace of a ball bearing 16, one pair of connect- 60 binations other than opposites. ing rods 17 being rigidly fixed to the ring 15 Another object of the invention is to proas indicated at 18 and providing thereby ride a propeller as outlined which is light master rods. The ball bearing 16 is mounted in weight and economically constructed as on a crank 19 constituting a part of the crank- 16 his uy of theparts may be made in the form of shaft 20, which extends into the hub 5 and sheet metal stampings. through the hub 6 and is rotatable therein.

Other objects of the invention will become The crankshaft 20 may readily be replaced apparent as the following description is read by a cam shaft and internal cam and having in connection with the drawings forming a rollers cooperating with the cam surface and 20 part of th specification. replacing the pivots 14 on the connecting rods 70 The invention consists of a pair of spaced 12. discs concentrically mounted, wlth an lnter- The adjustment is indicated as conslsting posed eccentric or cam adjustable by means of a Worm gear 21 fixed on the crankshaft 20 of a shaft extending through one hub of the and meshing with a worm 22 and operated by discs, the other hub being driven by a source a handwheel 23. of power, a plurality of vanes pivoted at The propeller may be driven in any suitatheir rearward ends between the discs adjabl n r, indicated as bevel gears 24 and cent the periphery, the forward end of the 25 th 24 b i fi d on th d f vanes being restrained by connecting rods h b 5 governed by the eccentric or cam, whereby, as s it bl b i 26 are id d f th so the discs are revolved, with the cam or ecc'enh b 5 d tric held stationary, the vanes are forced out- In Operation referrinn. to Fig 2 with the ward and withdrawn with each revolution propeller mvofvina 00511139cjockwige7 the of the discs. The eccentric or cam being adpropeller would trgvel to the right By ML lusmble b 1158 genie/1. Penmts reacmon of justing the crank about through an angle of fj i n any dujectlon transverse to the ninety degrees counter-clockwise, the vanes MUS 9 i pmpfeuel' would be projected at the left side and Withlteterrmg to the accompanying drawing: 1" 1 h b rf in which prawn at tie 11g it, t .916 y plot lolng 1 t- Fig. 1 is a longitudinal sectional elevation d Whfle further fidlustment of i l throi'lgh the propeller bearing and adjusting glee/S would cause b e vanes to be plolect'ed below and withdrawn above, thus driving to is a transvmse sectional elevation the left with a reversal of motion from that through the propeller. lndlcated the figure- Similar reference characters are used to g describeclan P W- m h P designate similar parts throughout the sev- CO tTU lHg and using the inventlon, 1t Wlll eral views. be understood that variations in construc- The propeller consists of a pair of dished tion, design and arragement of parts which dist-s and at concentrically mounted on hubs are consistent with the appended claims may 3 and 6 by any known method, indicated as be resorted to Without departing from the spirit or scope of the invention or sacrificing any of the advantages thereof.

I claim 1. A propeller comprising a pair of oppositely disposed, spacedly related, rotatably mounted, dished discs having a plurality of interposed equi-angularly spaced U shaped vanes pivotally mounted adjacent the ends of the legs thereof, connecting rods pivotally connected to said legs adjacent the cross member, a crank shaft concentrically mounted relative to said discs and rotatable in the hubs, thereof and having the crank interposed between said discs, a collar rotatably mounted.

on said crank, said connecting rods being piv-' otally connected to said collar exceptfrom' oneof said vanes being fixedly connected and comprising a master rod, means for driving said propeller, and means for rotatably adjusting said crankshaft.

2. A propeller comprisinga pair of disks I spacedly related and having hubs rotatably mounted in bearings, a crankshaft rotatably mounted in said hubs, means for adjusting the crank position of said crankshaft, a plurality of U shaped vanes pivotally mounted at the ends of the legs thereof between'said disks, a ball bearing on the crank of said crankshaft, a collar fixedly secured on the outer race thereof and rods pivotally connected to the legs of the vanes adjacent the cross member thereof, one of said rods being fixedly connected to said collar, the others of said rods being pivotally connected thereto.

In testimony whereof I have afiixed my signature.

BYNUM B. MQCBOSKY. 

